ast: fix error condition causing assert to fail

type2str returns a string that doesn't start with $ or \, so it can't be
assigned to an IdString.

diff --git a/frontends/ast/genrtlil.cc b/frontends/ast/genrtlil.cc
index 52e0574864ede53293bceacd2fb21d01cdfd3d55..6b119b7fff93f6c1f2bdfd188c7c1dd2d6a6bb8f 100644 (file)
--- a/frontends/ast/genrtlil.cc
+++ b/frontends/ast/genrtlil.cc
@@ -2006,8 +2006,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
        default:
                for (auto f : log_files)
                        current_ast_mod->dumpAst(f, "verilog-ast> ");
-               type_name = type2str(type);
-               log_file_error(filename, location.first_line, "Don't know how to generate RTLIL code for %s node!\n", type_name.c_str());
+               log_file_error(filename, location.first_line, "Don't know how to generate RTLIL code for %s node!\n", type2str(type).c_str());
        }
 
        return RTLIL::SigSpec();